1002020099 has 16 divisors (see below), whose sum is σ = 1075835904. Its totient is φ = 931543200.

The previous prime is 1002020087. The next prime is 1002020177. The reversal of 1002020099 is 9900202001.

It is not a de Polignac number, because 1002020099 - 2¹² = 1002016003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1002020009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75152 + ... + 87474.

It is an arithmetic number, because the mean of its divisors is an integer number (67239744).

Almost surely, 2^1002020099 is an apocalyptic number.

1002020099 is a deficient number, since it is larger than the sum of its proper divisors (73815805).

1002020099 is a wasteful number, since it uses less digits than its factorization.

1002020099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12458.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 1002020099 is about 31654.7010568731. The cubic root of 1002020099 is about 1000.6729134193.

The spelling of 1002020099 in words is "one billion, two million, twenty thousand, ninety-nine".